<html>
<head>
<link href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css"
rel="stylesheet" />
        <script type="text/javascript">$(document).ready(function(){
                 });
        </script>
</head>

<body>
<div class="row-fluid">
    <div class="span10 well">
        <h3>frame</h3>
           <iframe id="if" name="nf" src="http://www.baidu.com" width="800" height="300">
           </iframe>
    </div>
</div>
</body>

<script
src="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.js">
</script>
</html>